Re: [PATCH v1 1/3] exfat: add volume limit bounds checks

[David Timber <dxdt@dev.snart.me>]

On 5/7/26 21:04, Yuezhang.Mo@sony.com wrote:
> I checked the code further and found that exfat_zeroed_cluster()
> already has a similar check, but it is only for directories and
> does not check the size of the block device.
>
> I think we should also add a check here, similar to the check
> in exfat_zeroed_cluster(), to check if the last cluster exceeds
> the device size. This way, the check will apply to both files and
> directories, and the check in exfat_zeroed_cluster() will no
> longer be needed.
Valid points. Redundant checks hurt consistency.

The existing checks can be changed to WARN_ON() later on, but I think
the priority for now should be preventing silent data loss from users
inadvertenly mounting a truncated volume.

Let's see if there are more checks like these in the codebase.